The Tokyo government had given seven criteria for monitoring the COVID-19 situation such as the number of new daily infections not surpassing an average of 20 in the past week.
The number of new cases in Tokyo fell to a low of two on May 23, but that has increased to more than 10 new daily cases for eight of the past 10 days.
The number of daily infections in Tokyo exceeded 200 on April 17 and then experienced a general decline.
The Tokyo Metropolitan Government issued an alert on Tuesday after Tokyo recorded 34 new infections of the new coronavirus on the same day.